Improvement in parallel vises



UNITED ,STATES PATENT FFICE.'

N. P. O'IIS, OF YONKERS, NEW YORK.

IMPROVEMENT IN PARALLEL VISES.

Specification forming part of Letters Patent No. 38,405, dated May 5, 1863 g antedated May 3, 1863.

To all whom t may concern:

Beit known that I, N. P. Oris, of Yonkers, in the county of Westchester and State ot' New York,'have invented a new and Improved Parallel Vise and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanyin g drawings, making a part of this specifcation, in which- Figure 1 is a side elevation of my invention, partly in section Fig. 2, a horizontal section of a portion of the same, taken in the line m x, Fig. l; Fig. 3, a horizontal section of a portion of the same, taken in the line y y, Fig. 1.

Similar lettersof reference indicate corresponding parts in the several gures.

The invention consists, principally, in anovel and improved means for adjusting and securing the vise in different positions relatively with the bench as the convenience ofthe workman require, whereby the device may be readily adjusted and firmly held in the desired position by a very simple contrivance, and one which will not appreciably augment the cost co it of construction.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents the back jaw ot' the vise, the shank or pillar B of which is stepped in a sock et attached permanently to the bench. C is a horizontal bar, which is also attached permanently to the bench, and has its front edge made concave, and corrugated if desired, as shown in Fig. 2; and D is a metal strap, the sides of which t over the sides ot the bar C, the strap at the same time encompassing a corru gated or smooth cylindrical surface, a, on the shank or pillar B. The strap D is secured to the bar C by keys E, by driving up which the inner side of the rounded part of the strap D and the front side ot' the bar G are made to clutch rmly the cylindrical part a of the shank or pillar B, as will be fully understood by referring to Fig. 2.

In the shank or pillar B, just above the cylindrical portion a there is tted horizontally a socket, F, which is provided with an internal screw-thread to receive a screw, G, which passes horizontally through the shank or pillar H of the front jaw, I. The upper end, b, of the shank or pillar B is made of cylindrical form, and the lower end of the jaw Ais provided with asocket, c, which is tted on the upper cylindrical end b of the shank or pillar B, and is allowed to turn freely thereon. The socket c ot jaw A and cylindrical end b of the shank or pillar B have a rectangular opening, d, made through them to receive a key, a', when it is designed that the jaw A shall not turn.

The front jaw, I, of the vise is permanently attached toits shank or pillar H, and the lower parts of both of the shanks or pillars are made of Tform in their horizontal section, as shown clearly in Fig. 3.

J J represent two bars, which cross cach other and are connected at their centers by a pivot, e. The upper ends of the bars J are provided with a longitudinal slot or recess to receive the shanks or pillars B H, and the upper ends of the cross-bars are connected to said shanks or pillars by pivots f, and the lower ends of the bars J are slotted like their upper ends and t loosely on the lower pa-rts ot the shanks or pillars.

From the above description it will be seen that when the screw G is turned the shank or pillar H will be forced toward the shank or pillar B, and the article secured between the two jaws A I, and it will also be seen that in case the article to be held is of taper form, or has its sides out of parallel with each other, the jaw A may be made to adj ust itself properly to the article by removingthe key from the socket o of the jaw A, and the cylindrical end b of its shank or pillar B, and when articles of parallel sides are to be grasped the jaw A may be held securely to its shank or pillar by inserting the key in c and b, said jaw when held stationary being parallel with the jaw I.

It will also be seen that by loosening the strap D the shank or pillar B may be turned either to the right or to the left in a more or less oblique position with the bench to which it is attached and secured in the desired positionby tightening up the keys E. By having the ends of the cross-bars J fitted to the shanks or pillars B H, as shownto wit, the

ends of said bars provided with slots and tted on the lower parts of the shanks or pillars, the latter are well braced and prevented from being twisted or racking under the action of the screw G. The invention as a whole is eirtremely simple, and may be constructed at a moderate cost, not greatly exceeding that of the ordinary vise.

I would remark that the part a, of the shank or pillar B may be made of polygonal form instead of cylindrical, and the inner side of the strap D, which ene nnpasses said part a, may,

be of corresponding form, so that when the pillar B is secured in position plane surfaces ofthe part ci and strap D will be in Contact'. This arrangement, however, is an equivalent of that previously described.

I do not claim, broadly, the employment or use of the Cross bars J, for they have been previously used; but

I do claim as new and desire to secure by Letters Patent- Y N. P. OTIS.

Witnesses R. GAWLEY, E. W. I-IoDGsoN. 

